From 82ff47d80320a5ead469f7e84f70aa847b195adf Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 29 May 2002 22:30:17 +0000
Subject: [PATCH] (AC_PROG_EGREP, AC_PROG_FGREP): New macros.

---
 lib/autoconf/programs.m4 | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/autoconf/programs.m4 b/lib/autoconf/programs.m4
index eb03a204..4284ce60 100644
--- a/lib/autoconf/programs.m4
+++ b/lib/autoconf/programs.m4
@@ -259,6 +259,31 @@ AC_DEFUN([AC_PROG_AWK],
 [AC_CHECK_PROGS(AWK, gawk mawk nawk awk, )])
 
 
+# AC_PROG_EGREP
+# -------------
+AC_DEFUN([AC_PROG_EGREP],
+[AC_CACHE_CHECK([for egrep], [ac_cv_prog_egrep],
+   [if echo a | (grep -E '(a|b)') >/dev/null 2>&1
+    then ac_cv_prog_egrep='grep -E'
+    else ac_cv_prog_egrep='egrep'
+    fi])
+ EGREP=$ac_cv_prog_egrep
+ AC_SUBST([EGREP])
+])# AC_PROG_EGREP
+
+# AC_PROG_FGREP
+# -------------
+AC_DEFUN([AC_PROG_FGREP],
+[AC_CACHE_CHECK([for fgrep], [ac_cv_prog_fgrep],
+   [if echo 'ab*c' | (grep -F 'ab*c') >/dev/null 2>&1
+    then ac_cv_prog_fgrep='grep -F'
+    else ac_cv_prog_fgrep='fgrep'
+    fi])
+ FGREP=$ac_cv_prog_fgrep
+ AC_SUBST([FGREP])
+])# AC_PROG_FGREP
+
+
 # AC_PROG_INSTALL
 # ---------------
 AC_DEFUN([AC_PROG_INSTALL],